C++程序  |  26行  |  615 B

//===----------------------------------------------------------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

// <ios>

// template <class StateT> class fpos

// converts to and from streamoff

#include <ios>
#include <cassert>

int main()
{
    typedef std::fpos<std::mbstate_t> P;
    P p(std::streamoff(7));
    std::streamoff offset(p);
    assert(offset == 7);
}